Q. Which of the following is an adaptation for osmoregulation in freshwater teleost fish? A. Excreting large quantities of dilute urine B. Excreting large quantities of uric acid C. Having high concentration of blood urea D. Excreting large quantities of uracil Ans: Excreting large quantities of dilute urine
Which of the following is an adaptation for osmoregulation in freshwater teleost fish? Read More »
Q. In a food chain, the efficiency of transfer of energy from one trophic level to the next is 10%. The PERCENTAGE of energy that is expected to transfer from the second to the fourth level is . Ans: 0.99-1.01
Q. Consider a diploid population at Hardy-Weinberg equilibrium. For a locus with two alleles, the frequency of the A1A1 genotype is 0.01. The frequency of heterozygotes A1A2 is (answer up to 2 decimal places). Ans: 0.179-0.181
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Q. If the mean of a sample is 5, and the variance is 25, the PERCENT coefficient of variation is . Ans: 99-101
Q. El Niño Southern Oscillation (ENSO) events have occurred approximately every 3-7 years over the last century. The cause of these ENSO events is related to A. large-scale air-sea interactions in the Pacific Ocean B. strong monsoon winds in the Indian Ocean C. the melting of icebergs in the Antarctic Ocean D. unsustainable overfishing in
Q. Which of the following is NOT essential for a behavioural trait to evolve by natural selection? A. The behavioural trait differs among individuals B. The behavioural trait is determined at least in part by genes C. The behavioural trait influences reproductive success D. The behavioural trait is determined entirely by genes Ans: The behavioural
Q. A scientist finds a new species of insect and sends a sample to a museum for confirmation. The curator of the museum designates it as a holotype for the newly identified species and asks the scientist to also provide samples of the opposite sex. This sample of the opposite sex is called the (A)
Q. Which of the following is NOT a characteristic of r-selected species? A. Early sexual maturity B. High juvenile mortality C. High parental care D. Large number of offspring Ans: High parental care
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Q. Which of the following is NOT an example of phenotypic plasticity? A. Density-dependent swarming behavior in locusts B. Increase in DDT resistance in mosquitos C. Seasonal variation in plumage colouration in birds D. Temperature-dependent sex determination in turtles Ans: Increase in DDT resistance in mosquitos
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Q. Natural populations often deviate from Hardy-Weinberg equilibrium. One possible reason for this is (A) no migration (B) no selection (C) random mating (D) small population sizes Ans: small population sizes
